Power factor improving converter and power supply device including power factor improving converter

摘要

Provided are a plurality of circuit blocks each including: a first series circuit including a first rectifying element and a first switching element which are connected in series; a second series circuit including a second rectifying element and a second switching element which are connected in series; and a capacitor, wherein output terminals are connected to both ends of the first series circuit, both ends of the second series circuit, and both ends of the capacitor. Input terminals of the respective circuit blocks are connected in series. An AC power source is connected thereto via a choke, thereby solving the problem.